package com.qk.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.qk.common.PageResult;
import com.qk.dto.CourseDto;
import com.qk.entity.Course;
import com.qk.mapper.CourseMapper;
import com.qk.service.CourseService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;


@Service
public class CourseServiceImpl implements CourseService {
    @Autowired
    private CourseMapper courseMapper;
    @Override
    public PageResult<Course> list(CourseDto courseDto) {
        PageHelper.startPage(courseDto.getPage(),courseDto.getPageSize());
        List<Course> list = courseMapper.selectList(courseDto);
        Page<Course> page = (Page<Course>) list;
        return new PageResult<>(page.getTotal(),page.getResult());
    }
    @Override
    public void deleteById(Integer id) {
        courseMapper.deleteById(id);
    }

    @Override
    public void addCourse(Course course) {
        course.setCreateTime(LocalDateTime.now());
        course.setUpdateTime(LocalDateTime.now());
        courseMapper.addCourse(course);
    }

    @Override
    public Course getById(Integer id) {
        return courseMapper.selectById(id);
    }

    @Override
    public List<Course> listAll() {
        return courseMapper.listAll();
    }

    @Override
    public List<Course> listBySubject(Integer subject) {
       return courseMapper.listBySubject(subject);
    }

    @Override
    public void update(Course course) {
        course.setCreateTime(LocalDateTime.now());

        courseMapper.update(course);
    }

}
